‘I would say, sir, that it is desirable on technical grounds that some motive for Sir William’s taking out the boat should be discovered, and that the inquest is being adjourned to enable inquiries on this point to be made.’

‘Very well. I shall see the coroner and arrange it with him. It is not of course necessary for me to remind you of the importance of secrecy,’ and with a bow Chief Constable Soames took his leave, and the meeting broke up.

‘Come along round and have some supper at the George,’ Inspector Tanner invited the sergeant. ‘I’ve got a private room, and I want a talk over this business.’

The sergeant, flushed with the honour, and delighting in his feeling of importance, accepted, and the two went out together.

An hour later they lit up their pipes, and Tanner listened while the sergeant told him in detail all he knew of the affair. Then the Inspector unrolled a large-scale map he had brought, and spread it on the table.

‘I want,’ he said, ‘to learn my way about. Just come and point out the places on the map. Here,’ he pointed as he spoke, ‘is Halford, a place of, I suppose, 3000 inhabitants.’ The sergeant nodded and the other resumed. ‘This road running through the town from north to south is the main road from Bedford to London. Now, let’s see. Going towards London it crosses the Cranshaw River at the London side of Halford, and for about a mile both run nearly parallel. Then at the end of the mile, what’s this? A lane leading from the road to the river?’

‘Yes, that’s what we call the Old Ferry. It’s a grass-grown lane through trees, and there’s a broken-down pier at the end of it.’

‘H’m. Then the river bears away towards the south-east; while the road continues almost due south. Luce Manor is here in this vee between them?’

‘Yes, that’s it, sir.’

‘I see. Then at the end of Luce Manor, a cross road runs from the Bedford-London road eastwards, crossing the river just above the falls and leading to Hitchin?’